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MOLECULAR DESIGN OF NEW KINDS OF AUXETIC POLYMERS AND NETWORKS

《高分子科学:英文版》2004年 第4期 | Hong-meiWu Gao-yuanWei   DepartmentofPolymerScienceandEngineering CollegeofChemistry&MolecularEngineering PekingUniversity Beijing100871 China
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摘 要:Three new kinds of molecular networks are designed and predicted to exhibit negative Poisson ratios. Molecular mechanics calculations on these networks show that the magnitude of Poisson ratios depends on the relative flexibility of beam and arm structures. Several new kinds of auxetic polymers, whose successful synthesis should be easier than that of the corresponding auxetic networks, are then proposed. It is found that the kabob-like polymers with auxegens lying vertically on the main chain can acquire auxeticity while those with auxegens lying horizontally on the main chain cannot. Besides, a half kabob-like or pseudo-ladder polymer with auxegens linked at the intersection of the beam and the arm does show auxeticity when adopting constrictive conformers. It is, however, worthwhile noting that the origins of auxeticity still await and strongly deserve further experimental and theoretical investigations.
【分 类】【数理科学和化学】 > 化学 > 高分子化学(高聚物) > 高分子物理和高分子物理化学 > 高聚物的物理性质
【关键词】 分子设计 分子模型 细胞增大剂 细胞增大活性 聚合物 负泊松系数
【出 处】 《高分子科学:英文版》2004年 第4期 355-362页 共8页
【收 录】 中文科技期刊数据库